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I have been working with Linux based systems since 2002. I hope the article published on this site will be useful to those new to server administration.

Install Memcache onto cPanel running CentOS

Memcached is a service that allows entire database tables to be stored in memory, drastically speeding up queries to those tables and alleviating database load. In WordPress and W3 Total Cache, the Memcached module allows you to store all cache tables in memory. This guide can be used to set up Memcached on CentOS. Install memcached through RPM The easiest way to install …

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Linux: Finding and Locating files with find command part # 1

Many newcomers find it difficult use the find command at shell prompt under Linux. Find is nifty tool on remote server where UNIX admin can find out lot of information too. Find command can perform a search based on a variety of search constraints. It searches through one or more directory tree(s) of a filesystem, locating files based on some user-specified criteria. …

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How To Monitor Remote Linux Host using Nagios

In the previous post How to install Nagios on CentOS 5 or 6 , I explained the overview, installation and configuration of Nagios 3.0 on a CentOS Server. In the following three chapters, I’ll explain how to monitor a remote Linux host and the various services running on the remote host.  Also, please refer to all our Nagios articles. I. Overview II. 6 …

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Open SSL Heartbleed vulnerability – A complete check and fix

In this time, we all are aware about the new Open SSL Heartbleed vulnerability. The Heartbleed bug allows anyone on the Internet to read the memory of the systems protected by the vulnerable versions of the OpenSSL software. You will get more details from this link Heartbleed. The open SSL version 1.0.1 version has vulnerabilities except 1.0.1g and other versions. Different communities …

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Rsync: Preserve / Copy Hard Links ( Backup Rsnapshot Directory Tree )

I’m using rsnapshot filesystem snapshot utility to make incremental snapshots of local and remote filesystems for 10 production servers running on RHEL 5.x system. The rsnapshot commands makes extensive use of hard links, so if the file doesn’t change, the next snapshot is simply a hard link to the exact same file. How do I use the rsync command to copy my the entire snapshot …

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Bash Scripting Basics: Part 1

If you have been using computers for a while, whether you have been using Unix, Windows or Mac operating systems, you’re probably already familiar with the term shell. A shell is piece of software that is inbuilt into most operating systems which acts as an interface to the kernel and other software. Shells come in various shapes and sizes, but in …

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